Extension bar



Jan. '26 1926. 1,510,950

J. L. DOSTAL ET AL EXTENSION BAR Filed April 25, 1925 5 Sheets-Sheet 1 a I JOSE-FHA .DOST/QA.

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Jan. 26 1926;

, 1,570,950 J. L. DOSTAL ET AL V EXTENSION BAR Filed April 25 1925 3 Sheets-Sheet 2 Jessa/1.. Desi-4L.

i ATTORNEY.

J. L.- DOSTAL ET Al.

EXTENSION BAR Filed'April 25, 1925 I5 Sheets-Sheet 3 2. was Y. mm E Mm W F/ V T I Zm M M Kw g fl Q AU. w B :1 I I I l I 1| Pilllllll t N F:

Patented Jan. 2 t"), 192.55

- UNITE srara PATENT fOFEICE.

JOSEPH L. DOSTALANI) ALEXANDER ANDERSON, 0F DETROIT, MICHIGAN, ASSIGNORS r0 EARL HOLLEY, OF DETR I M CHIGAN.

nxrnnsion BAR.

Application filed. April 25, ,1925. Serial No. 25,743.

To all whom it may concern:

Be it known that we, JosErH L. DOSTAL and ALEXANDER ANDERSON, citizens of the United States, residing at 8530 Dexter Blvd. and9299 Cascade Ave., Detroit, respectively, in the countyof lVayne and State of Michigan, have invented certain new and useful Improvements in Extension Bars, of which the following is a specification.

This invention relates to means for increasing the capacity of the molding machine shown in the patent to Candler, #1,4L93,4c69, dated May 13, 1924:. In molding machines of this type, in which a plurality of molds are mounted on parallel guide bars which rotate the molds sliding on the guide bars into and out of engagement with each other, the size of the castings which can be automatically ejected downwardly is limited to the distance between the two guide bars, larger castings having to be removed by being lifted out with tongs. This limitation of the size of the casting that can be made in the molding machine is a very serious matter, and it is the object of this invention to obviate this restriction and to thereby increase the capacity of these machines.

By means of the novel construction described below one of the two guide bars is shortened so that the ejected casting can fall between the guide bars in the gap thus formed. The outer mold, which is the half of the mold which is not moved radially, is supported by a single guide bar and also by a projecting piece extending between the guide bars, thus forming a complete outer ring stiffening the single 'uide bars so that the molds can be clamped together tightly just as they are whendouble guide bars are used extending from the table to the outer molds.

Figure 1 shows a plan view of this invention.

Figure 2 shows a developed elevation.

Figure 3 shows an elevation partially in section on the plane 33 of Figure 2.

In the figures, A is the stationary bed plate provided with the cams B-C D. This bed plate A also carries a bracket F on which is mounted the ejector return cam G. Upon the bed plate A there is also mounted a rotating table II which carries 12 pairs of arms I J. The arms I I extend a considerable distance out from the rotating table H, and form guides for the inner molds and riers L L which support that half of the molds which are radially stationary.

As the arms J J are shortened the mold carrier L is only supported by the single guide bar I, and while this outer mold is bolted to. the guideI and does not slide thereon, still it is necessary to substitute some support for the shortened arm J which no longer reaches to the outer mold support. This support is provided through the extension bars-M M, see Figures 1 and 2. These extension bars M M are bolted to the mold supports L L and to each other so that the whole group of 12 molds are tied together by these bars M M, which provide a complete outer circle stiffening the guide bars I I and supporting the outer mold-supports L L. Of course a single ring may be substituted for the bars M. M, without departing from the spirit of this invention.

The operation of the molding machine, which is no part of this invention, is briefly as follows The mold supports K L are rotated with the table II and are brought into and out of engagement with each other by means of the cams B C D. In the position shown in Figure 1, the molds are being closed after having been opened for the ejection of the casting, the cleaning of the molds, and the lampblacking of the molds, as described in the following patents Candler, #1,493,469; Dostal, $21,495,728; A7nderson, #1,505,123; Anderson, #1525,- 9 3.

The cam G is merely for the purpose of returning the ejector mechanism which operates on the same principle as that disclosed in the patent to Candler, #1,493,4C69, referred to above.

As stated before the invention resides in the provision of a plurality of extension arms M which render it possible to eliminate one of the guide bars I J as far as the support of the outer mold carriers L L is concerned, and thus permit the downward ejection of castings which would otherwise be too large to pass between the guide bars I J.

lVhat we claim is:-

1. In a rotating molding machine having a plurality of pairs of parallel guides of unequal length radially mounted thereon and having with each parallel pair of guides a pair of mold supports, an inner mold support supported by said pair of rails, an outer mold support supported by only the longer of said rail supports, a circumferential ring supporting each outer mold support and its neighbor, means for closing and separating said mold supports, whereby when the mold supports are in the open position the castings produced therein which exceed in dimension the distance between the parallel mold guide supports can drop freely past the guide supports.

2. In a rotating molding machine having a plurality of pairs of parallel guides of unequal length radially mounted thereon and having with each parallel pair of guides a pair of mold supports, an inner mold support supported by said pair of rails, an outer mold support supported by only the longer of said rail supports, a plurality of extension bars securing each of the longer of said pairs of guides to its neighbor, means for closing and separating said mold supports, whereby when the mold supports are in the open position the castings produced therein which exceed in dimension the distance between the parallel mold guide supports can drop freely past the guide supports.

In a rotating molding machine having a plurality of pairs of parallel guides of unequal length radially mounted thereon and having with each parallel pair of guides a pair of mold supports, an inner mold support supported by said pair of rails, an outer mold support supported by only the longer of said rail supports, a circumferential ring supporting the longer of said pairs of guides to its neighbor, means for closing and separating said mold supports, whereby when the mold supports are in the open position the castings produced therein which exceed in dimension the distance between the parallel mold guide supports can drop freely past the guide supports.

4. A molding machine comprising an inner mold support, an outer mold support, guide means upon which said inner mold is slidably mounted, means for rigidly holding the outer mold support consisting of an extension of a portion only of said guide means, the other portion being shortened so as to leave unobstructed the space alongside the guide, whereby the castings may be dropped therethrough when mold sections are separated.

5. A molding machine comprising a pair of guide rails of unequal length, a pair of mold supports mounted thereon comprising an inner one slidably mounted thereon, one of said rails terminating so as to provide clearance for the ejection of castings from molds mounted on said supports, the other rail extending to said outer mold support, means for rigidly holding said support to said rail, whereby pressure may be exerted between said mold supports.

In testimony whereof we aflix our signatures.

JOSEPH L. DOSTAL. ALEXANDER ANDERSON, 

